How can I use a different program to view the camera videos?

Please refer to the Download and Developers’ Board pages of the STEP website (https://step.hanwha-security.com/usa_EN/Default.aspx/).
You need to sign-up as a member to be able to download the SDK required for writing a program, and you can receive support from the Developers’ Board.

Hanwha Vision is the leader in global video surveillance with the world's best optical design / manufacturing technology and image processing technology focusing on video surveillance business for 30 years since 1990.